Pugettia dalli, commonly known as Dall’s spider crab, is a species of crab found along the Pacific coast of North America. This distinctive crab is characterized by its long, spindly legs and its preference for inhabiting rocky reefs and kelp forests.
Description & Characteristics
Pugettia dalli, like other members of its family, is distinguished by its elongated legs, giving it a spider-like appearance. This species can grow to a maximum size of approximately 10 centimeters in carapace width. The carapace, or shell, is typically a reddish-brown color, often marked with white spots. The legs are covered in fine hairs and have sharp, hooked tips, allowing the crab to cling to rocks and kelp.
Habitat and Occurrence
Pugettia dalli is a common inhabitant of rocky intertidal zones and shallow subtidal areas along the Pacific coast of North America. Its range extends from Alaska to California, and it can be found in a variety of marine habitats, including kelp forests, rocky reefs, and tide pools. Pugettia dalli can often be found at depths ranging from the intertidal zone to around 100 meters. It is most commonly observed in the sublittoral zone, which lies between the low tide mark and the edge of the continental shelf.
Taxonomy
Pugettia dalli is classified within the Class: Malacostraca, Order: Decapoda, and Family: Epialtidae. Malacostraca is a large and diverse class of crustaceans, which includes lobsters, crabs, shrimp, and krill. Decapoda is an order within Malacostraca, characterized by having ten legs. The family Epialtidae, also known as the spider crabs, includes a variety of species with long, spindly legs and a preference for rocky habitats.
Feeding
Pugettia dalli is an opportunistic carnivore, feeding on a variety of prey items including small invertebrates, algae, and detritus. Its long, spindly legs allow it to reach into crevices and under rocks to capture prey. Pugettia dalli also uses its legs to scavenge for food on the seafloor.
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